Level structure of the double-shell closure system with Z=14 and N=20:^(34)Si  

作　　者：Chang-Bum Moon Cenxi Yuan Chang-Bum Moon;袁岑溪(Center for Exotic Nuclear Studies,The Institute for Basic Science(IBS),Daejeon 34126,Republic of Korea;Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,China)

机构地区：[1]Center for Exotic Nuclear Studies,The Institute for Basic Science(IBS),Daejeon 34126,Republic of Korea [2]Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,China

出　　处：《Chinese Physics C》2022年第12期226-231,共6页中国物理C（英文版）

基　　金：Supported by the Institute for Basic Science Korea(IBS-R031-D1);Guangdong Major Project of Basic and Applied Basic Research(2021B0301030006);computational resources from Sun Yat-sen University。

摘　　要：The level structure of the double-magic nucleus ^(34)Si(Z=14,N=20)was investigated by evaluating the available data.On the basis of experimental results from the beta-decay and fusion-evaporation reactions,we established the level scheme by assigning spin-parities up to 6_(1)^(+)at 6233 keV.The high energy positions of the excited states are consistent with the magicity at ^(34)Si,such as the 2_(2)^(+)state of the spherical ground band at 4.519 MeV and the 3^(-),4^(-),and 5^(-)states of the one-particle one-hole cross-shell states at approximately 4.5 MeV.This nucleus,for a long time,has attracted much attention because of,on one side,a proton bubble structure in the ground state and,on the other side,a deformation in the second 0^(+)state,0_(2)^(+).By a comparison of the constructed level scheme with the shell model calculations,we describe the emerging structures in the ground and second 0+states and the negative-parity 3^(-)states within the framework of the shell model context.We propose a deformed rotational band with the cascading 6_(2)^(+)−4_(1)^(+)−2_(1)^(+)transitions built on the 0_(2)^(+)state.

关 键 词：double shell closure level scheme two particle-two hole excitations large-scale shell model calculations 

分 类 号：O571[理学—粒子物理与原子核物理]